Zeppelin vs. Pterodactyls: the lost film

Rob sez, "One of the wacky ideas floated by Hammer Films in 1971 but never developed beyond a sweet poster was 'Zeppelin vs. Pterodactyls.' People have said it's tragic this movie was never made. Now tragically it has been made, a mashup of public domain cliffhanger serials and old movies. What if Republic Pictures had gotten this idea in 1936? See it here. Watch for glimpses of John Wayne, two 'Wilhelm' screams, and one actor who wasn't even born until 1939. Here's a link to the poster commissioned by Hammer Films to attract investors."
Link
(Thanks, Rob!)